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Microstates at the boundary of AdS
Samir D. Mathur, David Turton
The bound states of the D1D5 brane system have a known gravitational description: flat asymptotics, an anti-de Sitter region, and a 'cap' ending the AdS region. We construct pertur…
What the information paradox is {\it not}
Samir D. Mathur
There still exist many confusions about the black hole information paradox and its resolution. We first give a precise formulation of the paradox, in four steps A-D. Then we examin…
Effective information loss outside the horizon
Samir D. Mathur
If a system falls through a black hole horizon, then its information is lost to an observer at infinity. But we argue that the {\it accessible} information is lost {\it before} the…
Losing information outside the horizon
Samir D. Mathur
Suppose we allow a system to fall freely from infinity to a point near (but not beyond) the horizon of a black hole. We note that in a sense the information in the system is alread…
Correlations in Hawking radiation and the infall problem
Samir D. Mathur, Christopher J. Plumberg
It is sometimes believed that small quantum gravity effects can encode information as `delicate correlations' in Hawking radiation, thus saving unitarity while maintaining a semicl…